SPF record for noreply@webpagetest.org is incomplete

The DNS SPF Record of webpagetest.org does not allow the server it is using.

Received-SPF: softfail (google.com: domain of transitioning noreply@webpagetest.org does not designate as permitted sender) client-ip=;

This results on email from noreply@webpagetest.org very often appear as SPAM and are flagged as such.